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PATENTED FEB. 16, 190 1.

W.VIHASENBAGH. I CONTACT APPARATUS FOR THE PRODUCTION OF SULFURIG ANHYDRID.

APPLIUATION FILED APR. 28, 1902. 7 $0 MODEL. 2 $HEBTS-SHEET 1.

PATENTED FEB. 16, 1904.

v W. HASENBAGH. CONTACT APPARATUS FOR THE PRODUCTION OF SULFURIO ANHYDRID.

APPLIUATION FILED APR.28,1902.

2 SHEETFSHEET 2.

N0 MODEL.

Wdmwwo UNITED STATES Patented. February 16, 1904 PATENT Orrrcai.

CHEMISCHER FABRIKEN'IN MANNHEIM, OF MANNHEIM, GERMANY.

CONTACT APPARATUS FOR THE PRODUCTION oF su L FuR1c ANHYDRID.

SQPECIFIGA-IION formingpart of Letters Patent No; 752,165, dated February 16, 1904.

Applicationjfiled April128, 1902.

' To all whomitmctg concern: a

Be it known that I, WILHELM HASENBAGH,

a subject of the German Emperor, and a resident of and having my post-office address at Mannheim, Germany, (Chemische Fabrik Wohlgelegen,) have invented certain new and useful Improvements in Contact Apparatus for the Manufacture of Sulfuric Anhydrid, of which the following-is a specification.

This invention relates to a contact apparatus for the production of. anhydrous sulfuric acid in which platinized Woven fabrics are employed.

I am aware that the use of platinized woven fabrics for the above purpose is not broadly new, since it is disclosed in British Patent No. 24,748 of 1899.

The object of the present invention is to provide a contact element made up of aplurality of separated and supported sheets of plati nized fabric which may be readily inserted in or removed from the apparatus without interrupting theflow of gas therethrongh and which will insure an intimate and uniform contact of thegas with theplatinized fabric in its passage through the apparatus.

The invention will be fully described here-' inafter, referencebeing had to the accompanying drawings, in which I Figure 1 is a vertical longitudinal section of an apparatus embodying my invention. Fig. 2 is a plan view of a portion of acontact ele' ment made in accordance with my invention.

Fig. 3 is a section of Fig. 2. Fig. 4 is a section, on enlarged scale, to more clearly illustrate the construction of an element.

The apparatus consists of a cast-iron casing, preferably rectangular in cross-section and made up of sections bolted together. The lower section a is provided with'a gas-inlet b and the upper section 6 with 'a gas-outlet f, and between these sections a series of sections 0 and d are arranged in such manner that the sections a project inwardly beyond the sections d, thereby forming guides and supports for the contact elements g, as indicated at c. It may be stated that 'in' practice the casing will be inclosed with brickwork to prevent rasaai No. 105,070. on mac.)

'idiation of heat, and as it necessary to pro-. vide openings for the insertion or withdrawal of theelement-s the sections .0 and extend beyond the sections a and e at what may be termed the front of the apparatus, and the sections d are open at this side. A plate his secured to the front edges of the sections 0 in any-suitable manner and provided with openings h, whichregister with the open ends of the sections d, and these openings are closed by the removable covers In order to prevent cooling of the contact element at its side near the door, an insulating-block q is loosely inserted in the forwardly-extending portion of each section d and supported upon the section 0 below it,-' as clearly shown in Fig. 1. Theremay be as many elements 9 as desired in the apparatus, three being shown in the present case, and each may be easily and independently removed from the apparatus through its own door and a new element inserted in its place without stopping the flow of gas through the casing.

The contact elements 5! are each constructed as follows: There are two rectangular cast-iron frames k, provided with a series of inwardlyprojecting lugs Zr, and between these frames are clamped a series of sheets of suitabl -prepared asbestos fabric, (indicated by Z, each. .sheet being supported by a sheet of wire-netting 11,. There is also a thin wrought-iron frame 0 and asbestos packing 19 between adacent layers of asbestos fabric and supporting wire-netting, and asbestos packing p is also inserted between the respective frames k and the adjacent layer of asbestos fabric and supporting-wire. Bolts mpass through 'opposite lugs of the frames is, and when the nuts m on such bolts are tightened up the fabric, wire-netting, frames 0, and packings pwill be tightly clamped between the frames 70 and tight joints formed around the edges of the element, so that the gas will be compelled to pass up through the several layers of fabric. For the purpose of preventing any leakage of gas around the elements g the upper surface of each section a is machined as is also the lower surface of the lower frame 7c of each element, and a gas-tight joint will thus be formed between the contacting surfaces of each element and its support.

- of supporting-frames, a plurality of sheets of platinized fabric, and wire-netting arranged between adjacent sheets of platinized fabric, said fabric and netting being clamped between and supported by said frames, substantially as set forth.

2. A contact element for the production of anhydrous sulfuric acid, consisting of upper and lower supporting-frames, a plurality of sheets of platinized fabric between said frames, spacing-frames between adjacent sheets of fabric, wire netting also between adjacent sheets, and means for clamping the supporting-frames together, substantially as set forth.

' 3. A contact element for the production of anhydrous sulfuric acid, consisting of upper 3 and lower supporting-frames, a plurality of sheets of platinized fabric between said frames, spacihg-framesbetween adjacent sheets of fabric, wire-netting also between adjacent sheets, asbestos packing interposed between 35 adjacent spacing-frames and also between the supporting-frames and the adjacent spacingframes, and means for clamping the supporting-frames together, substantially as set forth.

I 4. In an apparatus for the production of 4 anhydrous sulfuric acid, the combination with a casing having gas inlet and outlet passages, aseries of inwardly-pro ectingledges forming supports, and a series of openings 'in one'side,

of contact elements slidably supported by said 45 ledges and the contacting surfaces of the ledges and elements forming gas-tight joints, and each element being separately removable through one of said openings in the casing, and detachable means for closing said openings, sub- 5 

